I just rolled out three new IIS 7.5 win2k8r2 servers. I copied the iis config to each machine so they are pretty much the same.
Over the weekend srv1 stopped around 3am, srv2 stopped around 4:30 and srv3 ran until about noon. All threw 503 errors. Anyone have any tips on troubleshooting this? The only thing I can find is the w3c logs stopped at those times, no connections after. To get the sites back up a simple iis reset. When I logged into the servers the app pools were running as well as websites. VM logs do not show any mem, disk or cpu spikes. No known network issues at this time.
Any ideas appreciated.